common: Move some CPU functions out of common.h

These functions belong in cpu_func.h since they do not use driver model.
Move them over. Don't bother adding comments since these functions should
be deleted.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Tom Rini <trini@konsulko.com>
diff --git a/arch/powerpc/cpu/mpc8xxx/cpu.c b/arch/powerpc/cpu/mpc8xxx/cpu.c
index 467eac4..ed482a9 100644
--- a/arch/powerpc/cpu/mpc8xxx/cpu.c
+++ b/arch/powerpc/cpu/mpc8xxx/cpu.c
@@ -10,6 +10,7 @@
 #include <config.h>
 #include <common.h>
 #include <command.h>
+#include <cpu_func.h>
 #include <tsec.h>
 #include <fm_eth.h>
 #include <netdev.h>